Post specific categories to specific pages. (6 posts)

So I have this site that I am developinghttp://andrewbusch.724impact.com
I'm almost done, I just need 5 specific codes, each on a different query and only showing an excerpt.
Must display title, date published, the AddThis links that are displayed, and the excerpt with "...Read More"
Main page will display latest 3 posts from all categories, blog page just the last 3 posts from the blog category, media page just the last 3 posts from the media category, speaking topics page just the last 3 posts from the speaking topics category, and news page just the last 3 posts from the news category.

does anyone have a code for me? I'm sure this has been done a million times.

ok so i replaced the title line with<?php thematic_postheader(); ?>
and that gave me By ADMIN | Published: DECEMBER 6, 2011 | Edit
if anyone has a way to make it so that By ADMIN isnt there it would be helpful.